Leather-rolling machine.



J. R. NICHOLS & G. A; JOHNSON.

LEATHER ROLLING MACHINE.

APPLICATION FILED DEC 2 I916 Patented July 10, 1917. 2 SHEETS-SHEET I.

J. R. NICHOLS & G. A. JOHNSON.

LEATHER ROLLING MACHINE.

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JAMES R. NICHOLS AND GUSTAVE A. JOHNSON, OF COREY, PENNSYLVANIA.

LEATHER-ROLLING MACHINE.

Application filed December 2, 1916.

To all whom it may concern:

Be it known that we, JAMEs R. NICHOLS and GUs'rAvn A. JOHNSON, citizens of the United States, and residents of Corry, in the county of Erie and State of Pennsylvania, have invented certain new and useful Improvements in Leather-Rolling Machines, of which the following is a specification.

The present invention relates to rolling machines for leather and the like and has particular reference to new and useful improvements in yieldable work supporting tables.

An object of our invention is to provide a work supporting table adapted to yield under the variations in thickness of a sheet of leather or the like, in order to assure easy operation of the rollers and to render more efiicient the operation of such devices.

Another object of our invention is to provide means for raising and lowering the work-table and work from and to the rollers, said raising and lowering mechanism being used in conjunction with yieldable supports whereby when the table is raised during operation the stress imposed thereon by the uneven thickness of the leather will be taken up by the yieldable support, thereby preventing fracture of the parts and tending to produce a leather sheet having a higher quality of finish.

A further object of our invention is to provide a device of the character described having few parts, adjustable, cheap to manufacture and install, and effective in operation.

Other objects and advantages to be derived from the use of our improved rolling machine table will appear from the following detailed description and the claims, taken with an inspection of the accompanying drawings, in which:

Figure 1 is a side elevational view of a work-table for rolling machines embodying the improvements of our invention;

Fig. 2 is a fragmental end view of one of the raising elements;

Fig. 3 is an enlarged section taken on the line 33 of Fig. 1; and

Fig. 4 is an enlarged plan view of one of the rock arms.

Referring more particularly to the drawings, wherein similar characters of reference designate like and corresponding parts throughout the various views, 10 designates a Work-table, 11 the work, which may be a Specification of Letters Patent. Patented July It}, 1917.,

Serial No. 134,688.

B so desi nated in their entireties. are identical in construction, as are the yieldable supports. Therefore, we shall describe but one of the same.

Referring to the raising element I? we provide a rock arm 13 having a recess 14 in the upper free end thereof to be engaged by the enlarged bearing portion 15 of an arm 16, said arm being reduced and threaded as at 17 to engage in an adjustable extension 18, the latter having an enlarged head 19 provided with a semi-spherical seat 20. The seat 20 is adapted to receive a semi-spherical enlargement 21 formed on a bearing plate 22 carried by the under surface of the worktable 10.

The lower end of the rock arm 13 is rounded for reception into a semi-cylindrical recess 23 formed in the upper surface of a plunger 24, said plunger being receivable in the casing a. A coiled cushioning spring or supporting element 25 is disposed within the casing a beneath the plunger 24. Downward movement of the plunger is limited by a stop pin 26 arranged concentrically of the casing.

In order to manipulate the raising elements It and R a pair of levers 26 and 27 extend from said rock. arms 13, the free ends of said levers 26 and 27 being adjacent and provided with recesses 28. The recesses 28 receive loops 29 formed on the upper end of a rod 30, said rod being connected to a foot pedal 31 pivoted at 32 on the base B.

In operation it will be noted that when the levers 26 and 27 are actuated downwardly the rock arms 13 will be moved toward each other causing the table to be raised. In the event that uneven thicknesses are present in the sheet of leather or the like 11 these uneven thicknesses will be taken up by a distortion of one or the other of the raising members through the yieldably mounted plungers 24:. It will be apparent that the portions 16 and 18 of the members R and B may be readily adjusted,

this adjustment being permitted by virtue of the universal connection afforded by the recesses 20 and enlargements 21. By applying an ordinary pipe wrench to the sections 18 this adjustment may be effected. vVe desire to lay particular stress upon the extreme simplicity of the structure ofour invention, there being no bolts, nuts or the like to secure the various parts, connection being afforded in the provision of the recesses 14:, 23 and the rounded ends of the rock arms 13 and section 16. Of course, it is to be understood that we do not limit ourselves to the application of our invention as shown, it being apparent that by various slight modifications the same may be adapted for use in connection with other types of machines, either for rolling leather or for other purposes.

From the above description taken in connection with the accompanying drawings, it is thought that a clear and comprehensive understanding of the construction, operation and advantages of our invention may be had, and while we have shown and described the device as embodying a specific structure, we desire that it be understood that such changes may be made in said structure as do not depart from the spirit and scope of the invention as claimed.

Having thus fully described our invention, what we claim as new and desire to secure by Letters Patent, is:

1. In a device of the class described, the combination with a table, of a base member, casings mounted thereon, plungers operabl in said casings, yieldable supporting means for said plungers, rock arms pivoted on the upper ends of said plungers, means adjustably connecting the upper ends of Copies of this patent may be obtained for five cents each, by addressing the said rock arms with said table, and lever members extending from the rock arms and adapted to actuate the same.

2. In a device of the class described, the combination with a work-table, of a base member having casings mounted thereon,

plungers arranged in said casings, yieldablesupporting means for said. plungers, rock arms pivotally mounted on the upper ends of said plungers, adjustable connecting members between the upper ends of said rock arms and the under surface of said table, lever members extending toward each other from said rock arms, and means connected with the fre ends of said levers to simultaneously move the same and raise or lower said table.

3. In a device of the class described, the combination with a work-table, of casings, yieldable supporting members arranged in said casings, rock arms pivoted on the upper ends of said members, levers extending adjacent each other from said rock arms, means to actuate said levers to move said arms, members connecting said arms with said table, said members being adjustable, and universal connections for the upper free ends of said members with said table.

4. In a device of the character described, the combination with a work table, of a plurality of casings having yieldable supporting means therein, rook arm members associated with said casings, means carried by the rock arms to afford manipulation of the same, adjustable means connecting the free ends of said rock arms with said table, and means to actuate said rock arms.

In testimony whereof, we aflix our signatures hereto. 7

JAMES R. NICHOLS. GUSTAVE A. JOHNSON.

Commissioner of Patents, 7

Washington, D. G. 

